A valve for metering a fluid. An armature of the electromagnetic actuator is movable along a longitudinal axis of a valve needle, the movement of the armature relative to the valve needle being limited by a stop surface on the valve needle. The armature has a passage channel. The stop surface is on a stop element. The stop element and the armature are such that during operation there always remains an intermediate space, adjoining the valve needle, between the stop element and an end face of the armature facing the stop element. The stop surface lies, in a contact region, on the end surface of the armature facing the stop element when the armature and the stop surface come into contact during operation, the contact region being situated between the intermediate space and an opening of the passage channel when the armature and the stop surface come into contact.

A nozzle for spraying a pressurized liquid. The nozzle is adapted for processing a pressurized liquid through an orifice of the nozzle, where the pressurized liquid forces a nozzle member away from a seat. The nozzle member is moved by the pressurized liquid against a counterforce produced by a gas pressure. Gas pressure operates against a plunger to produce a force acting on the nozzle member in opposition to the liquid pressure. A desired upstream pressure of the pressurized liquid is established when the forces across the movable nozzle member are balanced. A desired upstream pressure of the pressurized liquid can be changed by changing the pressure of the gas that forces the plunger against the movable nozzle member.

An external by-pass circuit for a positive displacement pump includes a flow diverter valve coupled to the pressure port of the pump. The flow diverter has an end coupled with a high flow output and another end coupled with a low flow output. The low flow end includes a by-pass arm coupled to and input flow fitting. The flow diverter valve further includes a ball valve to direct fluid to either the high flow or low flow output. The input flow fitting is coupled to the suction port of the pump at the one end and couples with a fluid source at the other end. The input flow fitting includes a flow control arm which includes a needle valve to selectively control flow within the flow control arm. The flow control arm also includes a by-pass fitting fluidly coupled with the by-pass arm of the flow diverter valve.

A pressure washer for dispensing either water or a water-chemical mixture includes an injector for injecting chemical into water flowing through a hose at a relatively high flow rate. A sprayer connected to the hose has a passage having one upstream, one middle, and first and second downstream portions. The first downstream portion is connected to a high pressure conduit and the second downstream portion is connected to a high flow conduit less resistance to fluid flow than the high pressure conduit. A valve between the upstream portion and the middle portion selectively allows fluid flow to the middle portion of the passage. Another valve between the middle portion and downstream portion selectively allows flow to the second downstream portion and high flow conduit. Otherwise the valve directs flow through only the first downstream portion and high pressure conduit, which limits flow rate so as not to activate the injector.

A piston cooling jet includes a first body and a second body. The first body includes a housing having an inlet fluidly coupled with nozzle outlets. The second body is coupled to the first body to form an interior chamber disposed inside the first body and the second body. The interior chamber is fluidly coupled with the inlet and the nozzle outlets. The interior chamber directs fluid received via the inlet through the nozzle outlets and out of the piston cooling jet assembly in a direction towards a spray target.

A machine tool chip removal device including a coupling interface to couple with a rotatable spindle of a machine tool to facilitate rotation of the machine tool chip removal device about an axis at a rotational speed. The chip removal device can also include a main fluid channel with an opening to receive pressurized fluid from the machine tool. The chip removal device can further include a first fluid delivery channel and a second fluid delivery channel to direct fluid in different directions. Each fluid delivery channel can be in fluid communication with the main fluid channel. In addition, the chip removal device can include one or more valves associated with the first and second fluid delivery channels to selectively allow fluid passage from the main fluid channel to the fluid delivery channels. The one or more valves can be actuated by varying fluid pressure and/or rotational speed.

A dosing dispenser system and a dosing dispenser include a slidable control configured to allow a user to select a desired mixing ratio for a product contained in a container attached to the dosing dispenser with a transport medium, such as water, flowing through the dosing dispenser.

A spray bar injector including a spray bar defining a longitudinal axis and including a fluid inlet and a plurality of spray outlet orifices spaced apart longitudinally in a direction along the longitudinal axis. A check or spray valve is operatively connected to each spray outlet orifice. A master valve is in fluid communication with the fluid inlet, operatively connected to divert flow from the fluid inlet into a first passage and block flow into a second passage in a first position to open the check valves and issue a spray from the spray outlet orifices, and to divert flow from the fluid inlet into the second passage and block flow into the first passage in a second position to close the check valves and block issue of spray from the spray outlet orifices.

A fluid sprayer includes a spray gun that is configured to output a spray of fluid for application on a substrate. A trigger of the spray gun is operatively connected to a controller to control actuation of a pump that drives the spray fluid to the spray gun. A solenoid is connected to a spray valve of the spray gun to actuate the spray valve open to cause spraying by the fluid sprayer.

A fluid sprayer includes a spray gun that is configured to output a spray of fluid for application on a substrate. A trigger of the spray gun is operatively connected to a controller to control actuation of a pump that drives the spray fluid to the spray gun. A solenoid is connected to a spray valve of the spray gun to actuate the spray valve open to cause spraying by the fluid sprayer.